driveshaft
12-16-2008, 12:42 PM
#31
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Year: 2003
Model: Grand Cherokee
Engine: 4.0L, 63mm TB, FIPK, Gibson Exhaust
ZJ is the 93 to 98 model, square front end, single headlights, the WJ is 99 to 04 curvy front end dual beam headlights.
Actually the D30 is pretty strong, the 35 is weak due to the 27 spline axle shafts, which is the same count as the D30 but the 35 is knecked down at the splines as well as only being 27 splines. If you lock the front with a lunch box you will loose your 4wd fulltime option on the TC, it just behaves badly locked. If you do a selectable they work great on teh 242 selectrac. It is always better to lock the rear first as weight shifts to the rear when climbing up hill, rarely have troubles going down hill when weight is on the front. Many have locked the D35 without problems, as mentioned problems usually start above 32s and when the operator smashes the skinny and gets it to hoping and breaks things.
Thanks TS. Thats exactly what I wanted to hear. I've got great clearance now, I'd hate to start lowering things unless absolutely necessary. I do have the double cardan, gonna take er in and get it fixed up, then just grease it as often as possible. The control arms are adjustable and tweaked as is to provide the best angle available. I'm hoping this one was just a fluke, I'll try it once and if I blow another shaft then I'll do the tcase lowering option.
Again, super helpful info on here. I am loving this Cherokee and the smiles on peoples faces when they see a cherokee on 33's roll by! Might move to bigger axles one day, but I'm pretty easy on the skinny pedal, especially with this automatic. I've run 33's on samurai axles locked front and rear and 5 spd and never had an issue, so I'm sure I'll be fine for the time being. But on that same token, is the front dana weaker than the rear? would you absolutely rule out running a locker in the front? for fear of breakage? I'm not going to heavy wheel this thing, mostly slow rock crawls.
Again, super helpful info on here. I am loving this Cherokee and the smiles on peoples faces when they see a cherokee on 33's roll by! Might move to bigger axles one day, but I'm pretty easy on the skinny pedal, especially with this automatic. I've run 33's on samurai axles locked front and rear and 5 spd and never had an issue, so I'm sure I'll be fine for the time being. But on that same token, is the front dana weaker than the rear? would you absolutely rule out running a locker in the front? for fear of breakage? I'm not going to heavy wheel this thing, mostly slow rock crawls.
12-16-2008, 12:56 PM
#32
CF Veteran
Some other things that make the ZJ and WJ different are:
-ZJ is about 5" narrower than the WJ
-Wj has a 3 link rear not the track bar set up like the ZJ
-Weight the WJ weighs more
-more UP graded goodies on the WJ
-ZJ is about 5" narrower than the WJ
-Wj has a 3 link rear not the track bar set up like the ZJ
-Weight the WJ weighs more
-more UP graded goodies on the WJ
12-16-2008, 01:31 PM
#33
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Year: 2003
Model: Grand Cherokee
Engine: 4.0L, 63mm TB, FIPK, Gibson Exhaust
I6 in WJ is more powerful, and is coil on plugs, 4.7L versus 5.2 and 5.9L V8s, bolt in axles versus c clips on the WJs
12-16-2008, 01:33 PM
#34
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ZJ is the 93 to 98 model, square front end, single headlights, the WJ is 99 to 04 curvy front end dual beam headlights.
Actually the D30 is pretty strong, the 35 is weak due to the 27 spline axle shafts, which is the same count as the D30 but the 35 is knecked down at the splines as well as only being 27 splines. If you lock the front with a lunch box you will loose your 4wd fulltime option on the TC, it just behaves badly locked. If you do a selectable they work great on teh 242 selectrac. It is always better to lock the rear first as weight shifts to the rear when climbing up hill, rarely have troubles going down hill when weight is on the front. Many have locked the D35 without problems, as mentioned problems usually start above 32s and when the operator smashes the skinny and gets it to hoping and breaks things.
Actually the D30 is pretty strong, the 35 is weak due to the 27 spline axle shafts, which is the same count as the D30 but the 35 is knecked down at the splines as well as only being 27 splines. If you lock the front with a lunch box you will loose your 4wd fulltime option on the TC, it just behaves badly locked. If you do a selectable they work great on teh 242 selectrac. It is always better to lock the rear first as weight shifts to the rear when climbing up hill, rarely have troubles going down hill when weight is on the front. Many have locked the D35 without problems, as mentioned problems usually start above 32s and when the operator smashes the skinny and gets it to hoping and breaks things.
12-16-2008, 01:38 PM
#35
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12-16-2008, 02:41 PM
#37
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ohhh, I see what yer getting at there. Well its not as if I'll be running it in 4wd on dry pavement ever. Only time i'd ever use 4wd high is when it s a blizzard and the roads are icy. Seeing as I am Ottawa, Canada, this means often!!
12-16-2008, 08:58 PM
#39
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Year: 2003
Model: Grand Cherokee
Engine: 4.0L, 63mm TB, FIPK, Gibson Exhaust
With the selectrac the 4wd fulltime selection is like an open diff in the transfer case, most say they behave badly in that mode with a lunchbox in the front. I think they hop and disengage abruptly during turning. I love the mode for wet roads and the like so I would never do a lunch box in the front. 4wd part time and 4wd low locks the front and rear diffs together so that is off road only and having a lunch box in the front would not matter in that mode. Most will say that you get the biggest bang for the buck by locking the rear since you most often loose traction going up obstacles and that is when most of the weight is transferred to the rear.
btw wjjeeps.com is the bible website for 99 to 04 Grand Cherokees
Last edited by tsconver; 12-16-2008 at 09:02 PM.
12-17-2008, 07:32 AM
#40
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no ZJs have cclips, WJs are bolt in.
With the selectrac the 4wd fulltime selection is like an open diff in the transfer case, most say they behave badly in that mode with a lunchbox in the front. I think they hop and disengage abruptly during turning. I love the mode for wet roads and the like so I would never do a lunch box in the front. 4wd part time and 4wd low locks the front and rear diffs together so that is off road only and having a lunch box in the front would not matter in that mode. Most will say that you get the biggest bang for the buck by locking the rear since you most often loose traction going up obstacles and that is when most of the weight is transferred to the rear.
btw wjjeeps.com is the bible website for 99 to 04 Grand Cherokees
With the selectrac the 4wd fulltime selection is like an open diff in the transfer case, most say they behave badly in that mode with a lunchbox in the front. I think they hop and disengage abruptly during turning. I love the mode for wet roads and the like so I would never do a lunch box in the front. 4wd part time and 4wd low locks the front and rear diffs together so that is off road only and having a lunch box in the front would not matter in that mode. Most will say that you get the biggest bang for the buck by locking the rear since you most often loose traction going up obstacles and that is when most of the weight is transferred to the rear.
btw wjjeeps.com is the bible website for 99 to 04 Grand Cherokees
Based on the info below what is the difference between fulltime and part time, How can the t-case send power to all wheels without locking both driveshafts? Just to clarify, my front driveshaft is spinning all the time, whether engaged or not, its supposed to right?
Operating Modes: 2WD (Sends all power to rear wheels)
4WD High, full-time (Sends power to all wheels)
4WD High, part-time (Locks both front and rear driveshafts for increased traction)
NEUTRAL (Allows vehicle to be towed)
4WD Low, part-time (Doubles the transfer case gear ration for severe road conditions and low-speed pulling power)
Last edited by Gadzooks; 12-17-2008 at 07:39 AM.
12-17-2008, 09:58 AM
#41
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Year: 2003
Model: Grand Cherokee
Engine: 4.0L, 63mm TB, FIPK, Gibson Exhaust
This is some valuable information. I can't thank you enough. Ahh the joys of the internet.
Based on the info below what is the difference between fulltime and part time, How can the t-case send power to all wheels without locking both driveshafts? Just to clarify, my front driveshaft is spinning all the time, whether engaged or not, its supposed to right?
Operating Modes: 2WD (Sends all power to rear wheels)
4WD High, full-time (Sends power to all wheels)
4WD High, part-time (Locks both front and rear driveshafts for increased traction)
NEUTRAL (Allows vehicle to be towed)
4WD Low, part-time (Doubles the transfer case gear ration for severe road conditions and low-speed pulling power)
Based on the info below what is the difference between fulltime and part time, How can the t-case send power to all wheels without locking both driveshafts? Just to clarify, my front driveshaft is spinning all the time, whether engaged or not, its supposed to right?
Operating Modes: 2WD (Sends all power to rear wheels)
4WD High, full-time (Sends power to all wheels)
4WD High, part-time (Locks both front and rear driveshafts for increased traction)
NEUTRAL (Allows vehicle to be towed)
4WD Low, part-time (Doubles the transfer case gear ration for severe road conditions and low-speed pulling power)
WJJEEPS.COM has a good section on TCs.
4WD fulltime puts the TC in a mode similar to an open diff. All four tires get power but if one slips the TC will send all the power to that diff and if it is an open diff all the power goes to that wheel. Not useful in real slick conditions but great for wet roads or litely snow covered roads where extreme tire slip is not going to happen.
4wd parttime and 4lo locks the TC so that the front and rear diffs are locked together, much like a locker locks the wheels from side to side together in a diff. This is the mode for loose surfaces or four wheeling. If one wheel looses traction the other diff will still get power. Combined with locking axles this is what gets you anwhere you want to go.
as far as driveshafts, yes both will always be rotating since you do not have locking hubs to disengage. 2wd disconnects the DS from the TC so no power goes to the front but it all still spends and will drop your gas mileage about 0.5 mpg versus have selectable hubs on the front wheels.
12-17-2008, 07:42 PM
#43
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Year: 2001
Model: Grand Cherokee
Engine: 4.0 I6
I guess now would be a good time to ask a newbie question... LOL! 
I'm guessing the Selec-Trac is the preferred TC over the Quadra-Trac I, II and Quadre-Drive??
I'm guessing the Selec-Trac is the preferred TC over the Quadra-Trac I, II and Quadre-Drive??
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